Second, if your door is equipped with a deadbolt, throwing the bolt into the locked position should be easy- there should be no friction and the pressure of the door should rest against the door knob latch. The bolt should throw completely (1"), and if not, then it is not locking into position. A deadbolt only fully locks when the bolt is allowed to fully extend. An improperly aligned deadbolt lock will lead to excessive wear, maybe a broken key, or broken internal parts.
If you believe that your door locks have poor alignment, then it is important that you call a professional locksmith to remedy the situation. Your home will be better secured and you will be helping to prevent costly lock replacements in the future.